1 files changed, 0 insertions, 295 deletions
diff --git a/ANDROID_3.4.5/drivers/md/dm-exception-store.c b/ANDROID_3.4.5/drivers/md/dm-exception-store.c
deleted file mode 100644
index aa70f7d4..00000000
--- a/ANDROID_3.4.5/drivers/md/dm-exception-store.c
+++ /dev/null
@@ -1,295 +0,0 @@
-/*
- * Copyright (C) 2001-2002 Sistina Software (UK) Limited.
- * Copyright (C) 2006-2008 Red Hat GmbH
- *
- * This file is released under the GPL.
- */
-
-#include "dm-exception-store.h"
-
-#include <linux/ctype.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include <linux/vmalloc.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-
-#define DM_MSG_PREFIX "snapshot exception stores"
-
-static LIST_HEAD(_exception_store_types);
-static DEFINE_SPINLOCK(_lock);
-
-static struct dm_exception_store_type *__find_exception_store_type(const char *name)
-{
-	struct dm_exception_store_type *type;
-
-	list_for_each_entry(type, &_exception_store_types, list)
-		if (!strcmp(name, type->name))
-			return type;
-
-	return NULL;
-}
-
-static struct dm_exception_store_type *_get_exception_store_type(const char *name)
-{
-	struct dm_exception_store_type *type;
-
-	spin_lock(&_lock);
-
-	type = __find_exception_store_type(name);
-
-	if (type && !try_module_get(type->module))
-		type = NULL;
-
-	spin_unlock(&_lock);
-
-	return type;
-}
-
-/*
- * get_type
- * @type_name
- *
- * Attempt to retrieve the dm_exception_store_type by name.  If not already
- * available, attempt to load the appropriate module.
- *
- * Exstore modules are named "dm-exstore-" followed by the 'type_name'.
- * Modules may contain multiple types.
- * This function will first try the module "dm-exstore-<type_name>",
- * then truncate 'type_name' on the last '-' and try again.
- *
- * For example, if type_name was "clustered-shared", it would search
- * 'dm-exstore-clustered-shared' then 'dm-exstore-clustered'.
- *
- * 'dm-exception-store-<type_name>' is too long of a name in my
- * opinion, which is why I've chosen to have the files
- * containing exception store implementations be 'dm-exstore-<type_name>'.
- * If you want your module to be autoloaded, you will follow this
- * naming convention.
- *
- * Returns: dm_exception_store_type* on success, NULL on failure
- */
-static struct dm_exception_store_type *get_type(const char *type_name)
-{
-	char *p, *type_name_dup;
-	struct dm_exception_store_type *type;
-
-	type = _get_exception_store_type(type_name);
-	if (type)
-		return type;
-
-	type_name_dup = kstrdup(type_name, GFP_KERNEL);
-	if (!type_name_dup) {
-		DMERR("No memory left to attempt load for \"%s\"", type_name);
-		return NULL;
-	}
-
-	while (request_module("dm-exstore-%s", type_name_dup) ||
-	       !(type = _get_exception_store_type(type_name))) {
-		p = strrchr(type_name_dup, '-');
-		if (!p)
-			break;
-		p[0] = '\0';
-	}
-
-	if (!type)
-		DMWARN("Module for exstore type \"%s\" not found.", type_name);
-
-	kfree(type_name_dup);
-
-	return type;
-}
-
-static void put_type(struct dm_exception_store_type *type)
-{
-	spin_lock(&_lock);
-	module_put(type->module);
-	spin_unlock(&_lock);
-}
-
-int dm_exception_store_type_register(struct dm_exception_store_type *type)
-{
-	int r = 0;
-
-	spin_lock(&_lock);
-	if (!__find_exception_store_type(type->name))
-		list_add(&type->list, &_exception_store_types);
-	else
-		r = -EEXIST;
-	spin_unlock(&_lock);
-
-	return r;
-}
-EXPORT_SYMBOL(dm_exception_store_type_register);
-
-int dm_exception_store_type_unregister(struct dm_exception_store_type *type)
-{
-	spin_lock(&_lock);
-
-	if (!__find_exception_store_type(type->name)) {
-		spin_unlock(&_lock);
-		return -EINVAL;
-	}
-
-	list_del(&type->list);
-
-	spin_unlock(&_lock);
-
-	return 0;
-}
-EXPORT_SYMBOL(dm_exception_store_type_unregister);
-
-static int set_chunk_size(struct dm_exception_store *store,
-			  const char *chunk_size_arg, char **error)
-{
-	unsigned long chunk_size_ulong;
-	char *value;
-
-	chunk_size_ulong = simple_strtoul(chunk_size_arg, &value, 10);
-	if (*chunk_size_arg == '\0' || *value != '\0' ||
-	    chunk_size_ulong > UINT_MAX) {
-		*error = "Invalid chunk size";
-		return -EINVAL;
-	}
-
-	if (!chunk_size_ulong) {
-		store->chunk_size = store->chunk_mask = store->chunk_shift = 0;
-		return 0;
-	}
-
-	return dm_exception_store_set_chunk_size(store,
-						 (unsigned) chunk_size_ulong,
-						 error);
-}
-
-int dm_exception_store_set_chunk_size(struct dm_exception_store *store,
-				      unsigned chunk_size,
-				      char **error)
-{
-	/* Check chunk_size is a power of 2 */
-	if (!is_power_of_2(chunk_size)) {
-		*error = "Chunk size is not a power of 2";
-		return -EINVAL;
-	}
-
-	/* Validate the chunk size against the device block size */
-	if (chunk_size %
-	    (bdev_logical_block_size(dm_snap_cow(store->snap)->bdev) >> 9) ||
-	    chunk_size %
-	    (bdev_logical_block_size(dm_snap_origin(store->snap)->bdev) >> 9)) {
-		*error = "Chunk size is not a multiple of device blocksize";
-		return -EINVAL;
-	}
-
-	if (chunk_size > INT_MAX >> SECTOR_SHIFT) {
-		*error = "Chunk size is too high";
-		return -EINVAL;
-	}
-
-	store->chunk_size = chunk_size;
-	store->chunk_mask = chunk_size - 1;
-	store->chunk_shift = ffs(chunk_size) - 1;
-
-	return 0;
-}
-
-int dm_exception_store_create(struct dm_target *ti, int argc, char **argv,
-			      struct dm_snapshot *snap,
-			      unsigned *args_used,
-			      struct dm_exception_store **store)
-{
-	int r = 0;
-	struct dm_exception_store_type *type = NULL;
-	struct dm_exception_store *tmp_store;
-	char persistent;
-
-	if (argc < 2) {
-		ti->error = "Insufficient exception store arguments";
-		return -EINVAL;
-	}
-
-	tmp_store = kmalloc(sizeof(*tmp_store), GFP_KERNEL);
-	if (!tmp_store) {
-		ti->error = "Exception store allocation failed";
-		return -ENOMEM;
-	}
-
-	persistent = toupper(*argv[0]);
-	if (persistent == 'P')
-		type = get_type("P");
-	else if (persistent == 'N')
-		type = get_type("N");
-	else {
-		ti->error = "Persistent flag is not P or N";
-		r = -EINVAL;
-		goto bad_type;
-	}
-
-	if (!type) {
-		ti->error = "Exception store type not recognised";
-		r = -EINVAL;
-		goto bad_type;
-	}
-
-	tmp_store->type = type;
-	tmp_store->snap = snap;
-
-	r = set_chunk_size(tmp_store, argv[1], &ti->error);
-	if (r)
-		goto bad;
-
-	r = type->ctr(tmp_store, 0, NULL);
-	if (r) {
-		ti->error = "Exception store type constructor failed";
-		goto bad;
-	}
-
-	*args_used = 2;
-	*store = tmp_store;
-	return 0;
-
-bad:
-	put_type(type);
-bad_type:
-	kfree(tmp_store);
-	return r;
-}
-EXPORT_SYMBOL(dm_exception_store_create);
-
-void dm_exception_store_destroy(struct dm_exception_store *store)
-{
-	store->type->dtr(store);
-	put_type(store->type);
-	kfree(store);
-}
-EXPORT_SYMBOL(dm_exception_store_destroy);
-
-int dm_exception_store_init(void)
-{
-	int r;
-
-	r = dm_transient_snapshot_init();
-	if (r) {
-		DMERR("Unable to register transient exception store type.");
-		goto transient_fail;
-	}
-
-	r = dm_persistent_snapshot_init();
-	if (r) {
-		DMERR("Unable to register persistent exception store type");
-		goto persistent_fail;
-	}
-
-	return 0;
-
-persistent_fail:
-	dm_transient_snapshot_exit();
-transient_fail:
-	return r;
-}
-
-void dm_exception_store_exit(void)
-{
-	dm_persistent_snapshot_exit();
-	dm_transient_snapshot_exit();
-}